There's no doubt that The Walking Dead has had some serious religious undertones along the way. Not only does Morgan perpetually wax poetic about the merits of pacifism, but they've got an actual priest on hand by way of Father Gabriel. Gabriel's church served as a sort of sanctuary for the survivors for quite some time after Rick and company discovered him in Season 5, and the place was filled with verses that perfectly aligned with the zombie apocalypse theme of the show. Written on the wall, for example, was a passage from John 6:54 reading "he who eats my flesh and drinks my blood has eternal life." When it was written, that might've been meant as a metaphor, but it became a dark sort of reality. Meanwhile, the verses noted on his board also bore some serious significance to the story.
First, there was Romans 6:4 ("We were therefore buried with him through baptism into death in order that, just as Christ was raised from the dead through the glory of the Father, we too may live a new life"). Then, there was Ezekiel 37:7 ("So I prophesied as I was commanded; and as I prophesied there was a noise, and suddenly a rattling; and the bones came together, bone to bone. Indeed, as I looked, the sinews and the flesh came upon them, and the skin covered them over; but there was no breath in them"). Third on the list was Matthew 27:52 ("and the tombs broke open. The bodies of many holy people who died were raised to life"). Fourth was Revelation 9:6 ("During those days people will seek death but will not find it; they will long to die, but death will elude them"). And last but not least was Luke 24:5 ("In their fright the women bowed down their faces to the ground, but the men said unto them, Why seek ye the living among the dead?").
To be fair, Gabriel spent a long time holed up in that church as the world unraveled outside, so he might've put them up after the fact as a means of bearing witness to the chaos, but the passages are still pretty spooky in the context of the show.